Northampton tree canopy change 2011-2021

Author

Kent Johnson

Introduction

This report uses data from the National Land Coverage Database (NLCD) to summarize tree canopy changes in Northampton, Mass. from 2001 to 2021.

NLCD data was obtained from the Multi-Resolution Land Characteristics Consortium. An interactive viewer for the underlying data is available here.

The NLCD provides data on tree canopy coverage at 30 meter resolution. The percent of canopy coverage is reported for each 30 meter square, with data available for each year from 2011 to 2021.

Tree canopy in Northampton

Overall tree canopy coverage in Northampton was approximately 57% for the entire period 2011-2021.

Canopy coverage increased slightly from 57.2% in 2011 to a high of 57.7% in 2013, then decreased to a low of 56.6% in 2021, a decline of just over 1%.

Canopy coverage declined by 0.6% from 2011 to 2021, a loss of 133 acres.

This chart shows tree canopy coverage for the City as whole.

This table shows the canopy percent and the change in percent and acres for the entire city.

Change in tree canopy coverage in Northampton, 2011-2021
Coverage
Total area
(acres)
2011 2021 Change
Acres Percent Acres Percent Percent Acres
Northampton 22,881 13,086 57.2% 12,953 56.6% −0.6% -132.9

Data: Multi-Resolution Land Characteristics Consortium | Analysis: Kent S Johnson


Tree canopy in city centers

This chart shows the tree canopy coverage within the three city centers of Northampton.

Leeds center has the greatest amount of coverage, over 40%. Florence center has about 35% coverage while Northampton is about 20%.

The map at the end of this report shows the extents of the three city centers.

The next chart shows the change in percent tree canopy coverage in city centers since the 2011 baseline.

Leeds is the only city center with increased canopy coverage from 2011 to 2021. Coverage has decreased by almost 2% in Northampton and Florence.

This table shows the canopy coverage in 2011 and 2021 in the three city centers and the change in percent and acres.

Change in tree canopy coverage in city centers, 2011-2021
Coverage
City center Total area
(acres)
2011 2021 Change
Acres Percent Acres Percent Percent Acres
Leeds 116 46.9 40.3% 48.5 41.6% 1.3% 1.6
Florence 145 51.1 35.1% 48.4 33.3% −1.9% -2.7
Northampton 134 28.0 21.0% 25.6 19.1% −1.8% -2.4

Data: Multi-Resolution Land Characteristics Consortium | Analysis: Kent S Johnson


Tree canopy by zoning category

This chart show the tree canopy percent within five zoning categories aggregated from the City zoning. Unsurprisingly, there is considerable difference in tree canopy coverage across the different zoning categories.

The next chart shows the change in percent tree canopy since the 2011 baseline, by zoning category.

The canopy increase from 2011 to 2013 is mostly in the Rural and Suburban/Water supply zones. All zones have seen a decrease in canopy since 2013. The decrease is largest in the Business/industrial and Central business zones.

This table shows the canopy coverage in 2011 and 2021 by zone.

Change in tree canopy coverage by zoning category, 2011-2021
Coverage
Zoning class Total area
(acres)
2011 2021 Change
Acres Percent Acres Percent Percent Acres
Suburban/Water supply 6,434 4,251 66.1% 4,208 65.4% −0.7% -42.3
Rural 12,680 7,328 57.8% 7,291 57.5% −0.3% -37.7
Urban 2,602 1,187 45.6% 1,155 44.4% −1.2% -32.0
Business/industrial 919 287 31.3% 272 29.6% −1.7% -15.9
Central business 243 31.8 13.1% 26.8 11.0% −2.1% -5.0

Data: Multi-Resolution Land Characteristics Consortium | Analysis: Kent S Johnson


Tree canopy by ward and precinct

This chart show the tree canopy percent within each voting ward and precinct.

The next chart shows the change in percent tree canopy since the 2011 baseline, by ward and precinct.

This table shows the canopy coverage in 2011 and 2021 by ward and precinct.

Change in tree canopy coverage by ward and precinct, 2011-2021
Coverage
Ward and precinct Total area
(acres)
2011 2021 Change
Acres Percent Acres Percent Percent Acres
6A 1,833 1,384 75.5% 1,376 75.0% −0.5% -8.8
7B 5,434 3,979 73.2% 3,951 72.7% −0.5% -27.5
6B 3,317 2,153 64.9% 2,169 65.4% 0.5% 15.3
7A 2,354 1,554 66.0% 1,500 63.8% −2.3% -53.3
1A 1,909 1,145 60.0% 1,121 58.7% −1.3% -24.6
5B 928 469 50.5% 463 49.9% −0.6% -5.6
5A 352 171 48.6% 168 47.8% −0.8% -2.8
4B 2,717 1,237 45.5% 1,232 45.4% −0.2% -5.0
2A 175 78.6 45.0% 74.8 42.9% −2.2% -3.8
1B 430 192 44.8% 184 42.7% −2.1% -8.9
2B 528 228 43.1% 216 41.0% −2.1% -11.1
3B 296 76.5 25.9% 70.7 23.9% −2.0% -5.8
4A 134 29.9 22.2% 27.5 20.5% −1.8% -2.4
3A 2,471 387 15.6% 398 16.1% 0.5% 11.4

Data: Multi-Resolution Land Characteristics Consortium | Analysis: Kent S Johnson

Canopy change map

This map shows the change in tree canopy percent from 2011 to 2021. Overlays show Northampton city centers, zoning categories as aggregated for this report, and wards and precincts.

Low canopy map

This map shows areas of the city with less than 20% tree canopy in 2021 in pink. Overlays show Northampton city centers, zoning categories as aggregated for this report, and wards and precincts.

Copyright 2024 Kent S Johnson Creative Commons License 2024-08-18